chess vs checkmate

chess and checkmate both are nouns.

Word	Noun	Adjective	Verb	Adverb
chess	Yes	No	No	No
checkmate	Yes	No	Yes	No

chess (noun)	checkmate (noun)
a board game for two players who move their 16 pieces according to specific rules; the object is to checkmate the opponent's king	a chess move constituting an inescapable and indefensible attack on the opponent's king
weedy annual native to Europe but widely distributed as a weed especially in wheat	complete victory

chess (verb)	checkmate (verb)
	place an opponent's king under an attack from which it cannot escape and thus ending the game